Proposed model for PGAA at TRIGA IPR- R1 reactor of CDTN
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1 Proposed model for PGAA at TRIGA IPR- R1 reactor of CDTN AS LEAL, BT GUERRA, MABC Menezes, C Pereira Centre for Development of Nuclear Technology (CDTN), Brazilian Nuclear Energy Commission (CNEN), Av. Antonio Carlos 6627 CAMPUS UFMG, CEP Belo Horizonte/Brazil Federal University of Minas Gerais, Dept. of Nuclear Engineering Av. Antonio Carlos 6627 CAMPUS UFMG, CEP , Belo Horizonte/Brazil
2 TRIGA MARK I IPR-R1 Research Reactor
3 TRIGA MARK I IPR-R1 Research Reactor CNEN Institutes Research Reactors TRIGA IPR-R1 (CDTN Belo Horizonte)
4 J. A. Perrota 2014
5 THE TRIGA MARK I IPR-R1 GA Research Reactor Installed in 1960 Operating at 100kW. Ready (but no licensed!) to operate at 250kW Used mainly for training of NPP operators NAA applications Production of some radioisotopes
6 MOTIVATION 2005: Enhancement of TRIGA IPR-R1 Utilization Upgrade of the NAA Laboratory Production of new radioisotopes: 195m Pt, 64 Cu, 159 Gd, 125 Xe, Study of materials Neutron Beam: A Challenging Goal!
7 TRIGA MARK 1 IPR-R1 Enhancement of the reactor utilization Upgrade of the NAA laboratory TRIGA IPR-R1 reactor Possibility of using the neutron beam for new applications
8 THE TRIGA MARK I IPR-R1 GA Research Reactor 1980 s: Vertical Neutron Beam
9 THE TRIGA MARK I IPR-R1 GA Research Reactor 2008: Proposed Design for a PGAA enhancement of the reactor utilization!! upgrade of the NAA Lab possibility of using the neutron beam for new applications
10 THE TRIGA MARK I IPR-R1 GA Research Reactor Proposed inclined tube Control bars and central thimble Core and fuel elements
11 THE TRIGA MARK I IPR-R1 GA Research Reactor Inclined tube: view from the top of the pool and the reactor s room level
12 THE TRIGA MARK I IPR-R1 GA Research Reactor views of the inclined tube: bottom (left), top (right)
13 EXPERIMENTAL - Determination of the neutron flux Preparation of the tube and the gold monitors ( 198 Au) 100% The monitors were positioned equally spaced along the tube
14 EXPERIMENTAL - Determination of the neutron flux The monitors were positioned in the equally spaced positioned using a nylon guide line and polyethylene vials
15 EXPERIMENTAL - Determination of the neutron flux Insertion of the gamma shielding: cylindrical tube of polyethylene (1,0 m ) in to of the tube
16 EXPERIMENTAL - Determination of the neutron flux The insertion of the aluminum tube in the pool 5m length 5cm internal diameter 3mm thickness
17 EXPERIMENTAL - Determination of the neutron flux The insertion of the tube in the pool Right material No pressure of the fuel elements
18 EXPERIMENTAL - Determination of the neutron flux The insertion of the tube in the pool Right material
19 THE TRIGA MARK I IPR-R1 GA Research Reactor position of the inclined tube in the core positions used for NAA irradiations ( 3, 7, 10, 20, 25, 30) validation of the MCNP Model x10 11 cm -2. s
20 RESULTS - Thermal neutron flux 1,0E+09 1,0E+08 MCNP Experimental 1,0E+07 1,0E+06 1,0E+05 Z(cm) ,0E+04 Φ th (MCNP) 1.1 x x x x x x x x Φ th (exp) 1.7 x x x x x Δ exp(%) Δ MCNP(%) Z(m)
21 RESULTS - (Thermal /Epithermal) neutron flux - f
22 RESULTS - (Thermal /Epithermal) neutron flux - f
23 Utilization and Modification of the TRIGA Reactor Inclined Neutron Beam Proposed Design for a PGAA
24 RESULTS - VISED (Version X 24-E1) Particle Track Function Population of the neutrons in the core of the reactor and along across the inclined tube. The box in the top of the tube is a simplified model of the set sampledetector-shielding. The function particle track of the VISED platform was used to illustrate the geometry of the system and to facilitate the identification of possible problems, such as the neutrons or photons escaping from the tube
25 Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGNAA Facility B. T. Guerra 1, 2, A. S. Leal 2, C. Pereira 1, M. A. B. C. Menezes 1, 2
26 Monte Carlo Simulations for a Preliminary Design of TRIGA IPR-R1 PGNAA Facility B. T. Guerra 1, 2, A. S. Leal 2, C. Pereira 1, M. A. B. C. Menezes 1, 2
27 C0NCLUSION In principle, obtained suggests that the inclined tube could be used as a neutron guide for the PGAA facility Better characterization of both: thermal and epithermal neutron flux is necessary: improvement of the MCNP model and additional experimental data! Feasibility of a PGAA facility : Lot of things to do!!! Definition of the power of the TRIGA IPR-R1 operation, kW!!??
28
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